Improvement in carriage-wheels



n? i s @uiten ytetes gamut Hrsg WILLIAMv H. MARSHALL SUTTON, ASSIGN-OR'TO lHIMSELF AND H\0SEA B. SPALDING, OF MERRIMACK, NEW HAMPSHIRE.

Letters Patent No. 71,193, dated November 19,1867.

IMPROVEMENT IN CARRIAGE-WHEELS.

TO ALI/ WHOM IT MAY GONCERN:

Be it known that I, WILLIAM H. MARSHALL, of Sutton, in the' county of`Merrimack, and State of New Hampshire, hve invented new and usei'ul Improvements in Wheels; and I do hereby declare that the following is afull and exact description thereof, reference being had to the accompanying drawings and 'to the letters oi` reference mnrkecl'thereon.v u Y y l The nature of my inventioneonsists iii-providing for wheels, spokes with doubleiround tenons, and mortises in the hubs to correspond. It also relates to the peculiar manner in which 'the spokes are set in the hub, to

arrive at the greatest strength. y

To enable others skilled in the art to make and use my invention, I will proceed to describe its cr'lstruction and operation. v Figure 1 representsa plan of my improved wheel. Figure 2 represents a side elevation of thelhub, showing the position ofthe spokes; Figure 8 represents a horizontal section of tig. 1. Similar letters inthe different figures indicate corresponding parts. a represents the rim, b b b the spokes, "c c the double round tenons, with their shoulders d d; e the hub ff the mortises, which correspond with the tenons c c, and are located and formed in the hub e, aroundritscircumference `zigzag, one half ofthe spokes b b, with their centres standing directly-in under. the centre' of the rim a, the other half, with theirl centres standing outsidek andinside, alternate of. the others, as' seen in iig. 2. \By thus arranging the spokes b b, one half support therim a, the otherhali servin'gas braces, n 'hieh.support the rim a on 'both sides. The hub c being thus formed, the spokes b b, prepared with their doubleiround tenonsh e and shoulders d the length of thertenons c c, corresponding with the depth of the mortisesff, are driven in with cement down on their-shoulders d d, thus making. the hub e equally as strong as it was before the mertises ff were made. The spokes bA b are then ready to receive the rim a on the tenons of the rim end of the spokes Zi b, which had dpreviously been prepared in the usual way. i I

When the wheel is thus completed, the hub e retains its full strength'. The spokes b b being prepared and set as described, are more firm, and support the rim a for better than the common straight spoke', andnalso'superseding the double-spoke wheels, requiring a smaller spoke, which lgives more space between them, which greatly facilitates the operation oi' cleaning'the wheel. Thus the hub e can bevkept clean, rendering the spokes b b less liable to become loose from the working of dust, dirt, 85e., `between the hub'e and th'e shoulders d d of. the

spokes b b; and, also, instead of cutting into and through the hub, square mortises, the size of the spokes, as in the common wheels now in use, destroying valmost entirely the middle of the hub, which weakens the wheel at this point; also the mortises Abeing cut through'the -hu'b to the box, in lubrieatingthe axle, the grease or oil y works into and around the square tenons, which loosens'thesame. Two round holes are made, their diameter lessthan the thickness of the spokes-b b, their depth corresponding'with the length of the tenons c c. '.lhus by having two tenons to each spbke, we can vuse a'much shorter tenen, requiring less depth of morti'scs, thus obviating the necessity of mortis'ing through the hub to the box,leaving the hub around the box perfectly whole, making the huh stronger and better, thus giving the entire wheel beauty, symmetry, strength, and durability.

I. do not claim constructing the spokes for wheels with single, round, square, or double square tenons, as they are old and in common use; but

What I do claim, and desire to secure by Letters Patent, is-.

I claim the double round tenons c c, in combination withthe mortisesff, for the purposes a's described and set foi-th. Y

WILLIAM H. MARSHALL.

Witnesses: v

CnAnLEsC. MARSHALL, HIRAM H. D Avxs. 

